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Glenbrook Capital buys SenesTech shares in open market

SenesTech, Inc. reported that an account managed by Glenbrook Capital Management made a series of open-market purchases of its common stock.

(Neutral)
(Positive)
Form Type
4

Rhea-AI Filing Summary

SenesTech, Inc. reported that an account managed by Glenbrook Capital Management made a series of open-market purchases of its common stock. Between June 24 and June 29, 2026, the account bought a total of 25,416 shares at prices around $1.52–$1.56 per share. After these transactions, the account held 987,824 shares of SenesTech common stock indirectly. Glenbrook Capital Management is investment manager to the account and disclaims beneficial ownership of these securities except to the extent of its pecuniary interest.

Positive

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Negative

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Insider GLENBROOK CAPITAL MANAGEMENT
Role 10% Owner
Bought 25,416 shs ($39K)
Type Security Shares Price Value
Purchase Common Stock 5,172 $1.5244 $8K
Purchase Common Stock 6,812 $1.5558 $11K
Purchase Common Stock 9,442 $1.5288 $14K
Purchase Common Stock, $0.001 par value per share ("Common Stock") 3,990 $1.5501 $6K
Holdings After Transaction: Common Stock, $0.001 par value per share ("Common Stock") — 966,398 shares (Indirect, See footnote); Common Stock — 987,824 shares (Indirect, See footnote)
Footnotes (1)
  1. F1. The securities to which this filing relates are held directly by a certain account for which Glenbrook Capital Management (the "Reporting Person") serves as the investment manager. The Reporting Person disclaims beneficial ownership of the securities to which this filing relates for purposes of Section 16 of the Securities and Exchange Act of 1934, as amended, except to the extent of its pecuniary interest therein, if any.
Total shares purchased 25,416 shares Open-market common stock buys across June 24–29, 2026
Largest single-day purchase 9,442 shares Open-market purchase on June 25, 2026
Post-transaction holdings 987,824 shares Indirect SenesTech common stock position after June 29, 2026 trade
Sample purchase price $1.5244 per share June 29, 2026 open-market common stock purchase
Additional purchase price $1.5558 per share June 26, 2026 open-market common stock purchase
open-market purchase financial
"transaction_action: open-market purchase"
An open-market purchase is when an investor or a company buys shares on a public stock exchange at the going market price, rather than through a private deal. It matters to investors because these purchases change how many shares are available, can push the stock price up or signal confidence from large buyers, and often affect per-share metrics like earnings—think of it like someone buying lots of apples off a grocery shelf, reducing supply and potentially raising the price.
indirect ownership financial
"ownership_type: indirect; direct_or_indirect: I"
pecuniary interest financial
"except to the extent of its pecuniary interest therein, if any"
Section 16 regulatory
"disclaims beneficial ownership of the securities to which this filing relates for purposes of Section 16"
Section 16 is a U.S. securities law rule that governs the trading and disclosure obligations of company insiders — typically officers, directors and large shareholders — to promote transparency and deter unfair profit-taking. It requires insiders to publicly report their stock trades and allows companies or the issuer to reclaim quick, short-term profits from certain insider trades, like a scoreboard and a refund policy that help investors see and limit possible insider advantage.
investment manager financial
"serves as the investment manager"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider activity did Glenbrook Capital report for SenesTech (SNES)?

An account managed by Glenbrook Capital reported open-market purchases of SenesTech common stock. It bought 25,416 shares across several days, modestly increasing its indirect holdings and signaling additional capital committed through routine accumulation activity.

How many SenesTech (SNES) shares were bought in this Form 4 filing?

The filing shows 25,416 SenesTech common shares purchased. These buys occurred over four trading days, with each transaction disclosed separately, reflecting incremental accumulation rather than a single large block trade in the company’s stock.

What prices did the Glenbrook-managed account pay for SenesTech (SNES) shares?

The account paid per-share prices ranging from about $1.52 to $1.56. Individual transactions were reported at $1.5244, $1.5288, $1.5501, and $1.5558, illustrating relatively narrow price variation during the reported buying period.

What is the SenesTech (SNES) position size after these insider purchases?

After the reported transactions, the account managed by Glenbrook Capital held 987,824 SenesTech common shares. This reflects the updated indirect stake following the 25,416-share net increase disclosed in the Form 4 filing with the SEC.

How is Glenbrook Capital’s ownership in SenesTech (SNES) characterized in the Form 4?

The shares are held in an account for which Glenbrook Capital serves as investment manager. The firm disclaims beneficial ownership for Section 16 purposes, except to the extent of its pecuniary interest in the SenesTech securities held.

Are Glenbrook Capital’s SenesTech (SNES) purchases direct or indirect holdings?

The Form 4 classifies these as indirect holdings. The securities are owned by an account advised by Glenbrook Capital, with the investment manager reporting under Section 16 while disclaiming full beneficial ownership beyond its economic interest.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
GLENBROOK CAPITAL MANAGEMENT

(Last)(First)(Middle)
5396 AVENUE 18 1/2

(Street)
CHOWCHILLA CALIFORNIA 93610

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
SenesTech, Inc. [ SNES ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
DirectorX10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
06/24/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Common Stock, $0.001 par value per share ("Common Stock")06/24/2026P3,990A$1.5501966,398ISee footnote(1)
Common Stock06/25/2026P9,442A$1.5288975,840ISee footnote(1)
Common Stock06/26/2026P6,812A$1.5558982,652ISee footnote(1)
Common Stock06/29/2026P5,172A$1.5244987,824ISee footnote(1)
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Explanation of Responses:
1. The securities to which this filing relates are held directly by a certain account for which Glenbrook Capital Management (the "Reporting Person") serves as the investment manager. The Reporting Person disclaims beneficial ownership of the securities to which this filing relates for purposes of Section 16 of the Securities and Exchange Act of 1934, as amended, except to the extent of its pecuniary interest therein, if any.
Glenbrook Capital Management, By: /s/ John David Kessler, Director06/29/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

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